在nodeJs的其他模塊中使用Redis客戶端實例

Question

我有以下模塊連接到 Redis 數據庫，我想獲取客戶端實例，以便可以從其他模塊調用它，而無需每次都創建新實例，我做了以下操作：

let client;

const setClient = ({ redis, config }) => {
    client = redis.createClient({
        host: config.redis.host,
        port: config.redis.port
    });
};

const getClient = () => {
    return client;
};

const connect = ({ redis, config, logger }) => {
    setClient({ redis, config });
    client.on('connect', () => {
        logger.info(`Redis connected on port: ${client?.options?.port}`);
    });
    client.on('error', err => {
        logger.error(`500 - Could not connect to Redis: ${err}`);
    });
};

module.exports = { connect, client: getClient() };

當我使用const { client } = require('./cache');從其他模塊調用客戶端時它給了我undefined的

Answer 1

從頂部（let）擦除 letClient() 並在底部添加 const client = getClient() 並在模塊導出僅 go 與客戶端而不是客戶端：getClient()

Answer 2

我想出了以下解決方案：

const cacheClient = () => {
    return {
        client: undefined,
        setClient({ redis, config }) {
            client = redis.createClient({
                host: config.redis.host,
                port: config.redis.port
            });
        },

        getClient() {
            return client;
        },

        connect({ redis, config, logger }) {
            this.setClient({ redis, config });
            client.on('connect', () => {
                logger.info(`Redis connected on port: ${client?.options?.port}`);
            });
            client.on('error', err => {
                logger.error(`500 - Could not connect to Redis: ${err}`);
            });
        }
    };
};

module.exports = cacheClient;

如果有更好的方法請告訴我。